Imported GBXML cannot change Surface thickness

Help on setting up the building geometry, including importing from BIM

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maccusf
Posts: 2

Imported GBXML cannot change Surface thickness

Postby maccusf » Mon Mar 21, 2016 10:29 am

When my work colleague imports GBXML as a building block, it resets Construction>Geometry, Areas and Volumes>Geometry Convention Template to External Measurements, Internal Zone geometry. If we adjust this to apply fixed surface thicknesses or to read thicknesses from constructions, it displays a 0 thickness regardless.

Is there a setting we have missed or is it not possible to use OpenStudio for Sketchup to export GBXMLs?

I have attached to DB file.

Please could someone assist as soon as possible asmy colleague's evaluation version shall be running out in at the beginning of april and if we cannot resolve this by then, we shall be looking for a different program to perform our analysis.
Attachments
Bim Import Surface Issue.dsb
(1.11 MiB) Downloaded 143 times
Luis Sousa
Posts: 364
Location: Stroud

Postby Luis Sousa » Mon Mar 21, 2016 12:24 pm

Hello,

I believe that what we are seeing on your model is a limitation of DesignBuilder modeller to generate the inner geometry due to your model complex geometry.

As described in the help (http://www.designbuilder.co.uk/helpv4.7 ... olumes.htm) there are special conditions where the outer geometry being used instead when certain block geometries can prevent the inner zone volume from being generated. This can happen when:
- Zones where one or more zone outer geometry vertex has 4 or more surfaces adjacent, or,
- Cases where it is physically impossible to create the inner geometry from the outer geometry due to the surface thickness being too great. Examples of this situation include small kinks in the surface geometry with dimension of 2 x the surface thickness or less.

Although DesignBuilder is unable to generate full inner zone geometry for these zones it can still calculate approximate zone inner volumes and floor areas based on the outer zone geometry and surface thicknesses.

Hope this helps.

BR,
Luis
maccusf
Posts: 2

Postby maccusf » Mon Mar 21, 2016 1:21 pm

Many thanks. We will look into simplifying the elements we are importing and see if it helps. Thanks for the speedy reply.
Luis Sousa
Posts: 364
Location: Stroud

Postby Luis Sousa » Mon Mar 21, 2016 1:56 pm

Hi,

If you need more assistance then please contact the Support Desk team at http://support.designbuilder.co.uk/

BR,
Luis

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